Quality control of roasted coffee beans with FIA system for chemiluminescent determination of small amount of hydrogen ion.
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- BABA Tamie
- Chemistry Section, Kyorin University School of Health Sciences
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- YAMADA Masaaki
- Department of Industrial Chemistry, Faculty of Technology, Tokyo Metropolitan University
Bibliographic Information
- Other Title
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- 微量水素イオン測定用フローインジェクション/化学発光分析システムによるいり焼きコーヒー豆の品質管理
- ビリョウ スイソ イオン ソクテイヨウ フロー インジェクション カガク ハッ
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Abstract
The flow injection/chemiluminescence system with detectability at a concentration of 2 × 10-6 M for 20 μl injection of hydrogen ion was successfully applied to quality control of roasted coffee beans. The chemiluminescent reaction was composed of didodecyldimethylammonium bromide bilayer vesicle/ Eosin Y/ hydrogen ion/ sodium hydroxide. The relationship between the chemiluminescence intensity (X=log A where A is amperes) and the concentration (Y=log M where M is molarity) for hydrogen ion in the coffee essence was linear in the range of concentration from 6.8 × 10-6 M to 2.5 × 10-3M (Y= 0.73X+2.29). The determination was also selective and the reproducibility in terms of relative standard deviation was less than 1.1% for a 8.3 × 10-6 M hydrogen ion injection (10 repeated tests). The chemiluminescent signal originating in the extracted essence from roasted coffee beans was readily applicable to roast-process control and quality control of the coffee beans. Control checks were very easily and rapidly performed by the proposed flow system. The separation and identification of key-materials relating to the chemiluminescence signal are in progress.
Journal
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- BUNSEKI KAGAKU
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BUNSEKI KAGAKU 38 (3), T35-T39, 1989
The Japan Society for Analytical Chemistry
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Keywords
- flow injection system with chemiluminescent detection for determination of small amounts of hydrogen ion
- applications to quality control of coffee beans and process control of the roasting
- didodecyldimethylammonium bromide bilayer vesicle/Eosin Y/sodium hydroxide/ hydrogen ion chemiluminescent reaction system
Details 詳細情報について
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- CRID
- 1390282679332564992
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- NII Article ID
- 110002904951
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- NII Book ID
- AN00222633
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- NDL BIB ID
- 3222429
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- ISSN
- 05251931
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- NDL-Digital
- CiNii Articles
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- Abstract License Flag
- Disallowed